Castellum (CTM) adds IT services to subsidiary’s GSA MAS contract

Castellum, Inc. announced that subsidiary Specialty Systems, Inc. has added IT services to its GSA Multiple Award Schedule contract.

Rhea-AI Filing Summary

Castellum, Inc. announced that subsidiary Specialty Systems, Inc. has added IT services to its GSA Multiple Award Schedule contract. The company reported the update under Other Events on October 14, 2025, and furnished a press release as Exhibit 99.1. This expands the subsidiary’s offerings available through the government purchasing vehicle.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Castellum (CTM) disclose in this 8-K?

It reported that subsidiary Specialty Systems, Inc. added IT services to its GSA MAS contract.

Which subsidiary of CTM is involved?

Specialty Systems, Inc. is the Castellum subsidiary adding IT services to its GSA MAS contract.

What contract vehicle is affected for CTM?

The GSA Multiple Award Schedule (MAS) held by Specialty Systems, Inc.

When was the announcement made?

On October 14, 2025.

Where can investors find more details on CTM’s update?

See the press release filed as Exhibit 99.1 to the 8-K.

What is CTM’s exchange listing?

Castellum’s common stock trades on the NYSE American under the symbol CTM.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 10/14/2025 - 04:03 PM Learn about SEC filing dates

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities and Exchange Act of 1934

Date of Report (Date of earliest event reported): October 14, 2025

CASTELLUM, INC.

(Exact name of Registrant as specified in its charter)

Nevada

001-41526

27-4079982

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

1934 Old Gallows Road, Suite 350

Vienna, VA 22182

(Address of principal executive offices, including zip code)

(703) 752-6157

(Registrant’s telephone number, including area code)

Check the appropriate box below if the 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:

☐			Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13(c)).

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common stock, par value $0.0001 per share

CTM

NYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒

Item 8.01 Other Events

On October 14, 2025, Castellum, Inc. announced its subsidiary, Specialty Systems, Inc. has added IT services for its GSA MAS contract. The full text of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.			Exhibit Title
99.1			Press Release dated October 14, 2025
104			Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

CASTELLUM, INC.

Date: October 14, 2025

By:

/s/ Glen R. Ives

Name:

Glen R. Ives

Title:

Chief Executive Officer (Principal Executive Officer)